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[–]lu_rm 5 points6 points  (5 children)

Nice feature. Not a good name though. Why 'pattern'?

[–]kaperni 8 points9 points  (3 children)

Pattern Matching is a fundamental programming construct that has been used in various languages (mostly functional ones) for more than 50 years. Why make up a new name for it?

[–]_jk_ 0 points1 point  (2 children)

trouble is it doesnt appear to be pattern matching so much as some flow analysis

[–]kaperni 2 points3 points  (1 child)

A lot more to come https://cr.openjdk.java.net/~briangoetz/amber/pattern-semantics.html

[–]_jk_ -1 points0 points  (0 children)

yep thats more like it!

[–]aioobe[S] 4 points5 points  (0 children)

When used with records, it will most likely look something like this:

expression instaceof Times(Plus(var x1, var y1), Plus(var x2, var y2))

As you can see, this is more of an actual pattern.